it comes after the death of ambassador chris stevens in benghazi. here's abc's muhammad lila tonight. >> reporter: it's a country racked with lawlessness and now a potential new threat. the associated press first reported this video which claims to be from al qaeda's yemen branch announcing a new bounty. three kilograms of gold. roughly $160,000 for the head of the american ambassador in yemen and $23,000 for any american soldier. abc hasn't verified the authenticity of the video. it was posted online separately, claiming to be part of a longer video, one that we have authenticated. if true, the threat comes at a critical time, just four months after al qaeda-linked militants stormed the embassy compound in libya, killing ambassador chris stevens and three other american personnel. after the attacks, security levels were raised at many american embassies around the world. >> i think the security detail to the ambassador himself is not going to do anything particularly differently. because they had to know that the ambassador was already a person who